The Android APP has U D L R arrows plus a button in the center. When I press one of the arrow keys or the center button, it sends a Capital U D L R or C via Bluetooth to the HC-06 bluetooth module which sends it to the PIC. I then check what was sent and select which way to move the servos using the appropriate servo controller command bytes. The ASCII values are only used to tell which button was pressed. The values 122(z) 117(u) 85(U) 90(Z) and 103(g) are numeric values needed to send to the FT639 to intialize it. Once it it initialized then the protocol explained previously is used to position the servos.